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@uiten tant atwt @ffice FRANCIS E. HOWE vAND LEONARD WASHBURN OF STAFFORD, CONNEC- TICUT.

Letters Patent No. 69,438, dated October l, 1867,

MPROVEMENT. IN GAM FOR LOOMS.`

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TO ALL WHOM IT MAY CONCERN:

Be it known that we, FRANCIS E. Hown and LEONARD WAsHnUnSI, of Stafford, 'lolland county, State or Connecticut, have invented certain new and useful improvements in Harness-Motion for Looms' and we do hereby declare that the following is arfull and exact description thereof, reference being had to the accompanying drawings, and to tho letters of reference marked thereon. In the drawings- Figures 1, 2, and 3 represent three progressive positions of the invention.

This invention consists of a new and improved arrangement of the cams upon the shaft operating the levers working the harnesses. As the loom is in such general use, and so fully understood by all mechanics, we will not lengthen our description by unnecessary details of its construction, but will merely state that the motion required to be given to cach lever is a down motion, then a rest, then an up motion, and again a rest, and so on continually.

The lever A is pivotcd at or near the centre, so that one end is operated by the cam, and the other works the harnesses. In the drawings-'- I Figure l shows the lever A as it is in one of its rests, the wheelB being revolved in the direction indicated by the arrow. During this rest tho projection a. upon the lever is guided in the 'groove as the wheel is turned, until the whole rest has been accomplished. New, when the wheel B has turned sutiiciently to bring the end of the groove Z1 to the projection a, the cam-guide e upon the 4wheel strikes the projection (l u pon the lever, and throws the latter down, as shown in tig. 2, where the circular guide e upon the wheel passes in between the projection a and the upper end et' the projection d upon the lever. As this guide e has the same .radial centre as the wheel itself, the lever undergoes another rest until its end be reached. As the wheel turns round, it brings the end of the circumferential guidef against the projection g upon the lever. This throws up the latter again, and the projection a again enters the groove b. This last operation is shown in iig. 3. In all these illustrations the guides upon the lever are shown in dotted lines, as if seen through the lever. The projection y is, of course, deeper than the one, d, which passes over the guidef, while the one, g, is cammed against its end. A plate of the saine circumference of the wheel is placed on the other side ot' the lever, and is fitted closely against it upon the shaft, so as to prevent the lever from getting out of gear.V`

By reversing the motion'ot` the shaft, the lever motion is also reversed smoothly and evenly. Different relative lengths 0f stroke and distance may be made, so as to suit the machine used, and any number of these cams and levers attached to the shaft, as convenient. By this means we obtain a smooth and regular movement, and one that can be reversed perfectly.

The operation of the parts, as well as their construction, is simple and effective, and requires much less outlay than is necessary in the complicated arrangements used for this purpose in many cases.

And now, having described our invention, what we claim as new, and desire to secure by Letters Patent, is-

The combination of the cam-wheel B, having the guide Z1, guide c, guide e, and guidef, with. the lever A, having the projections a, rl, and g, the parts and the whole being arranged and operating substantially as and for the purpose described.

l FRANCIS E. HOWE,

LEONARD WASHBURN.

Witnesses: y

It. F. HYDE, EDWARD H. HYDE. 

